Anthrapyridone dyestuffs



Patented July 7, 1953 UNITED smrss PATENT oF-FIcs w H Y m Qfiflfiflftfifff 1:53,. as

zerland, assignors to San zerlandsa Swissfirm j ubgnr'awilig; T

The present invention elat'e'sto new valuable dyestuffs of the anthrapyridone series;

A primary object "of" the? present invention is the embodiment of 'anew group 01f arithrapyri-' done dyestuffs characterizedby superior 'fastness properties, particularly with respect-to fastness to'light and fast'ness 'to'fulling.

This object; as well asoth'e'r objects whichwill hereinafter appear, is realized bythe present invention, according to" which an anthraquinone compound which corresponds totheiormula .1

wherein X stands for phenyl or alkylphenyl, and Y stands for phenyl or tetrahydronaphthyl, either of which may carry any desiredsubstituent or substituents other than SOlubi'liZiIlg groups, such as sulfonic acid or carboxylic acid groups, is heated with .a benzoylacetic acid ester, whereby conversion of the starting compoundfinto the corresponding C-benzoyl-anthrapyridone takes place, whereafter the thus-obtained dye'stufi base is treated with asulfonating agent.

The new dyestuffsv thus produced correspond to the structure l, 1

wherein R represents hydrogeriimethyl,"Cl, f Br,

methoxy or initro, and X a' diYj'h yearsr u s vens i Preferred startingrahthraquinbnes for the productionfof' the'f r' ew dyestuffs ,oiflfthe'f presentf'lnvention' arethel am jo- 4-arylainino, aryloxy anthraquinones wherein thearylo'xy group'or' the irrcances; i

(101. A. (3;, Basel, Swit- "Application June [2 8, 1951, Serial fIn Switzerland June 30,1950,

: 61Claims.- (c zed-27a) aryl group or both may be substituted. Illustrative of these startingmaterials are:

1 amino 4 phenylamino 2- p tert. butylphenoxyanthraqulnone, 1 amino 4- phenylamino 2- p tert. amylphenoxyanthraquinone, 1 -'amlno 4 phenylamlno- 2 m, -j ethylphenoxyanthraquinone,

I amino 4 phenylamino 2 p cresoxyanthraquinone,

1 amino 4 phenylarnino Q 2 4; 'pv tert. octylphenoxyanthraquinone, f o

1 "-amino- 4 phenylamino 2 -'p cyclohexylphenoxyanthraquinone,

1 amino 4 phenylamina- 2 m cresoxyanthraquinone, I c I c c 1, amino-4 p -,toluidino 2.- p tert. amyl-.

phenoxyanthraquinone, k a Y 1 amino. 4 p -toluidino 2 p sec. amylphenox-yanthraquinone,

1 amino 4,- mesidino 2 p tert. amyl-,

, phenoxyanthraquinone, 1 -;amino 4-- phenylanilido -2 phenoxyan thraquinone, I 1 amino -4 p phenoxy anilido oxyanthraquinone, 1 amino 4 m chloranilido -'2,- p tert. oc-

tylphenoxyanthraquinone,

2 p cres 1 amino. 4 m xylidino 2 p tert. butylphenoxyanthraquinone, etc.

The expression a benzoylacetic acid ester is intended to cover the esters of benzoylacetic acid with lower alcohols-thus, for example, the benzoylacetic acid methyl ester and the benzoylacetic acid ethyl ester-and also derivatives thereof such as the o-nitro-,. m-nitro-, p-nitro-, pmethyl-,, p-nitro -methyln ochloro-, I m-chloro-, p-ch1oro-, and p-methoxy-benzoyl acetic acid methyl and ethyl esters.

The condensation of the starting materials may take place in the benzoylacetic acid ester itself as the solvent, or in an extraneous solvent which does not participate in the reaction, such for example as o-dichloro-benzene, nitrobenzene, phenol, etc. Approximately two, moles of benzoylacetic acid ester are employed per mole .of aminoanthraquinone; preferably a slight excess (5 to 10%) is used. ,The addition of a small quantlty'ot a weakly alkaline condensing agent,

such as sodium carbonate, potassium acetate, etc., speeds up the reaction in many cases. The requisite temperature lies between about 130 and about 180 C.; the condensation generally proceeds especially smoothly to completion in several hours at 160-165 C., particularly if the volatile reaction products are continuously removed from the reaction zone with the aid of a gentle stream of gas. The resultant benzoylpyridone is isolated as a red crystalline product by diluting the reaction mixture with alcohol, filtering off the separated material with the aid of a suction filter, washing the collected solid with alcohol and water, and drying.

To convert the thus-obtained dyestufi base into a wool dyestuff, the former is treated with a sulfonating agent. To this end, the base is suspended either in an organic solvent, such as chlorobenzene, nitrobenzene, etc., and treated with chlorosulfonic acid at a moderate elevated temperature until the desired water-solubility is achieved, or it is dissolved insulfuric acidmonohydrate and stirred at a moderate temperature (approximately 0 to 50 C.), if necessary with addition of some weak oleum. The sulfonated products are isolated in suitable manner, for example by pouring into water, salting out, filtering and washing the collected solid.

The thus-obtained dyestuffs dye wool and other animal fibers, such as silk, tussah, etc., as well as polyamides, such as nylon, in vivid yellowishred to bluish-red shades. The dyeings on wool are distinguished by their fastness to fulling and fastness to light.

The following examples set forth representative exemplary embodiments of the invention, and these examples are intended to be solely illustrative and not at all limitative. In these examples, the parts are by weight and the temperatures in degrees centigrade.

Example 1 Q A mixture of 50 parts of nitrobenzene, 3 0 parts of benzoylacetic acid ethyl ester, 45 parts of 1- amino 2-p-tert.-amylphenoxy-4-anilidoanthraquinone and 1 part of sodium carbonate is heated to 130 with stirring. The readily volatile reaction products are removed with the aid of a gentle current of air. The initially dark-violet melt gradually changes its color toward red. The condensation is complete when a test specimen, boiled in o-dichlorobenzene, does not become any redder, and a similar test specimen is insoluble in alcohol so that the latter is not colored bluishviolet thereby. The reaction takes about 24 hours. The reaction mixture is allowed to cool to 80, whereupon it is diluted with 100 parts of isopropyl alcohol, cooled further to 20 and filtered. The thus-isolated base, C-benzoyl-Z-ptert.-amylphenoxy-4 anilidoanthrapyridone, is then washed with water and dried. Itis obtained in the form of shiny crystals and dissolves in high-boiling solvents, such as nitrobenzene, trichlorobenzene and o-dichlorobenzene, and also in concentrated sulfuric acid, with red coloration.

10 parts of the said base are dissolved in 40 parts of sulfuric acid monohydrate, and then 12 parts of oleum of 27% strength added gradually; After stirring for four hours, a test specimen dissolves in water without residue; if necessary, additional oleum is added until complete watersolubility is achieved. The sulfonated product is then poured into 400 parts of an ice-water mixture, to which 40 parts of common salt (sodium chloride) have been added, the precipitated dyestuff filtered on and washed to neutrality with dilute sodium chloride solution. The dried dyestuff is a reddish-violet powder. It dyes wool in vivid red shades of excellent fastness to fulling and to light, and corresponds to the formula A mixtureof 50 parts of p-cresol, 40 parts of benzoylacetic acid ethyl ester, 46 parts of 1- amino-2-ptert. amylphenoxy-4 p-toluidoan- "thraquinone and 1 part of sodium acetate is stirred thoroughly at the readily volatile products of the resultant reaction being continuously removed by means of a current of nitrogen. When there is no change in successive test specimens in nitrobenzene, the reaction mixture is allowed to cool, whereupon it is diluted with methyl alcohol and the precipitated base separated by suction filtration. The thus-obtained base dissolves in sulfuric acid with bluish-red coloration.

10 parts of the said base are introduced at 10 into 50 parts of oleum of 7-8% strength, and the mixture stirred at 10-15 until a test specimen dissolves completely in hot dilute aqueous sodium carbonate solution. The thus-produced dyestufi is worked up in the manner described in Example 1. It is a violet-red powder and dyes wool, silk, tussah, nylon, etc., in vivid red shades, which are slightly more bluish than the shades of dyeings made with the dyestufi of Example 1. The dyeings made on wool with the dyestuff of the present example are of excellent fastness to fulling and to light. The said dyestuff corresponds to the formula Ll ll lTIH soln Example 3 A mixture of 100 parts of benzoylacetic acid ethyl ester, 1 part of potassium carbonate and 45 parts of 1-amino2p-tert.-amylphenoxy-4- anilidoanthraquinone is heated, with stirring, to and maintained at this temperature for 12 hours. Formed reaction products which boil below this temperature distil off. The thus-produced dyestuff base is then allowed to crystallize by cooling the reaction mass to room temperature (20-30). If desired, the base may be precipitated by dilution with alcohol. In either case,

\ the base is then filtered off, washed with alco- Example! .4 Q

55 parts of 1 amino-2-p-tert. butylphenoxy 4- anilidoanthraquinone are heated to 160-165 with 50 parts of benzoylacetic acid methyl ester, 75 parts of nitrobenzene and 1.5 parts. ofsodium carbonate, the mixture being maintained'at this temperature, with stirring, for 6 hours, readily volatile products of the reaction which ensues being allowed to distill off. The mixtureisthen cooled to 80, diluted with 120 parts of'alcohol, and. the precipitated base isolated, after the manner described in the preceding examples. There is thus obtained the C-benzoyl-2-p-tert. buty1- phenoxy-4-anilidoanthrapyridone in the form of fine orange-red needles, which dissolve in con.- centrated sulfuric acid with pure red coloration. 10 parts of this base are introduced into 45 parts of sulfuric acid monohydrate at a temperature below 12 parts of oleum of 28% strength being added inthe. course of 4 hours. Stirring is then continued until a test specimen is completely soluble in water. 'If necessary, auxiliary amounts of oleum may be'added'in order to achieve this result. The thus-produced sulfonation productis poured into a 10% aque ous sodium chloride solution, and the precipitated dyestuff filtered oii andwashed to neutrality with sodium chloride solution.. After drying, the dyestufi is a violet-red powder which dyes wool in vivid red shades which are fast to fulling and to light and which. correspond to the formula .smH f Example5- W 45 parts of 1-amino 2-p-tertamylphenoxy-ianilidoanthraquinone are stirred into 60 parts of o-dichlorobenzene, and 1 part of sodium carbonate and 38 parts of benzoylacetic acid ethyl ester are added. The mixture is heated to 160- 165, the condensation being run to completion in the manner described in the preceding examples. After dilution of the reaction mixture with methyl alcohol, filtering off the product,

and washing and drying the latter, thereis obtained the base described infExample 1. e I

10 parts of thisbase are introduced into: 40 parts of chlorobenzene, the'mixture warmed to 40, and 12 parts of chlorosulfonic acid added at IO-50. Stirring is continued for 3 hours at 45- 50, and the chlorobenzene removed with the aid of steam. To the resultant aqueous suspension- ,of the dyestuff, sufficient sodium chloride is added to assure complete precipitation of the dyestuff which is then filtered off, washed neu tral and dried. The dyestuff is obtained as a bright red powder and dyes wool, silk and tussah. in vivid red shades. The dyeings ongwool are of excellent fastness to fulling', and to light.

Examples h is heated to 165, andstirring continued at this temperaturefor 6 hours, while. distilling, ofi ,lower boiling fractions formed as a iresun of." the. eaction which takes "place. The resultantldye stufi base is recovered. from the reaction mix; ture in the manner, described. in "the," preceding examples. It takes the form of uniform red'crystals and dissolves inorganic solvents, suchas trichlorobenzene, and in. concentrated sulfuric acid Withbluish red coloration. 10 parts of the said'base. are introduced, 'at' a temperature below 15, into a mixture 'of v v45 parts of sulfuric acid monohydrate and 12 parts of oleum. of 28% strength. After stirring for three hours, a test specimen will be soluble in water without residue; if necessary in 'order to achieve complete solubility, a little more, oleum may beadded. The resultant si'ilfonationgproductv is poured into a mixture" of 400 parts of water and ice and 25 parts of sodiumv chloride. The precipitated dyestuifis filtered off with suction, washed neutral, and dried... Itjdyes wool in a bluishredshade which is fast ,to fulling andlto light. I f 1 f Amore yellowish dyestuif is obtained if,'in this example, the 50 parts of l-amino-2-p-iso-octyliphenoxy-4-p-to1uidoanthraquinone are replaced by 46 parts of 1-amino-2 p-tert. amylphenoxy- 4-o-t0luid0anthraquinone, the condensation and sulfonation being otherwise carried, out as described in the example. This dyestufiIgiVe'sdyeings also of good fastness tofulling and to light.

Example 7 5: J

A mixture of 43 parts of nitrobenzene; 30 parts ofbenzoylacetic acid methyl ester, 0.8 part "of stirred for five hours at 165, the volatile products of the resultant reaction-being removed with the aid of a gentle stream of gas. The reaction mixture is then cooled; to1100. and diluted with 80 parts of isopropyl alcohol. Stirring is continued for awhile at room temperature, whereuponthe separated dyestuff base is filtered oil, washed with isopropyl alcohol and water, and dried. "'-A very good yield 'ofbase is obtained in the form of orange-red crystals which dissolve in trichlorobenzene, and also in concentrated sulfuric a'cid, with vivid red coloration. Y V

10 parts of the said base-are dissolved, at a temperature below 15, in 40 parts of sulfuric acid monohydrate, and 12 parts of oleum are then be completely soluble in water. The thus-formed A mixtureof 50 parts ofnitrobenzene, 50 parts of 1 amino 2 p isoj-foctylphenoxy- 4.- p

toluidoanthraquinone, 1 partof sodiumca'rbon-fl ate and 38 parts'of benzoylacetie acid ethyl esterdyestufi is isolated after the manner described in the preceding examples. It dyes wool a vivid red of excellent wet fastness properties and of very good fastness to light.

' A dyestufi of very similar properties is obtained if, in this example, the 1'-amino-2-p-tert.-amyl phenoxy-4-m-toluidonanthraquinone is replaced by an equivalent quantity of 1-amino-2-p-tert.- butylphenoxy 4 a m toluidoanthraquinone, and

otherwise proceeding as described in the example.

It is also possible to start with a corresponding quantity of 1-amino-2-ptert.-amylphenoxy-4- m-chloranilidoanthraquinone, the condensation andsulfonation being carried out as precedingly described. The thus-obtained dyestuff produces dyeings on wool which are a more yellowish red than these'of the m-toluidine dyestufi, but which exhibit a; like fastness to fulling and to light.

Example 8 perature for hours, the readily volatile products of the ensuing reaction being distilled off. The reaction mixture is then cooled to 80, diluted with 120 parts of methyl alcohol, and stirred for a further hour. The resultant base is isolated in the form of dark orange crystals.

10 parts of this base are dissolved in 40 parts of sulfuric acid monohydrate at 10-12", and 13 parts of sulfuric acid monohydrate, whereupon 10 parts of oleum of 28% strength are run in at 5-10 within a period of minutes. Stirring is continued at the last-mentioned temperature until a test specimen is completely water-soluble, which should take about 8-10 hours. The thusproduced dyestufi is isolated after the manner described in the preceding examples. It dyes wool a bluish red of excellent fastness to fulling and to light.

By replacing the 60 parts of 1 amino 2- p-cresoxy-4-p-chloranilidoanthraquinone in this example by 62 parts of l-amino-2-p-tert.-amylphenoxy 4 p chloranilidoanthraquinone, and

parts of oleum of 26% strength then added in the gf if g i ggg g 'i gi g fig fgg ggggI course of 5 hours. Stirring is continued for 2 E; t e 11 t f 11 an more hours at 15, the sulfonation being then disw a g fiy y o equa y goo 5 continued if a test specimen is clearly soluble in ness 0 u mg an 0 1g water. A further small quantity of oleum is Example 10 added if necessary. The sulfonation mixture is then poured into a mixture of 200 parts of ice, 300 $1553 2; f g gggg f g gggg ggg gg gs if Patti of Ice-cold Water and 50 P'f of Sodmm potassium carbonate are stirred into parts of chloride, and the resultant precipitate separated nitrobenzene and 16 parts of benzoylacetic acid by suction filtration. The thus-isolated precipimethyl ester While removing the resultant tate is suspended in aqueous sodium chloride 20 lower boiling reaction products with the aid of a lution of 10% strength adjusted to neutrality gentle stream of nitrogen the mixture is heated with the aid of sodium carbonate, separated by to 0 for 5 hours It then cooled, diluted suctlfm filiratlon and drum The dyestufi' m with alcohol, and the precipitated base filtered obtamed' Is an Orange-red powder' It dyes 0 off washed with alcohol then with water and mal fibers a very vivid yellowish-red; its dyeings dried on wool are of excellent fastness to fulling and 10 'parts of the thusmrepared base is intrm good to hght' duced into 40 parts of sulfuric acid monohydrate A yellowlsh'red dyestufi of Sumlar propertles and the mixture stirred at -50 until a test is obtamed when in this example the 52 parts of specimen is completely water-soluble. The mix- 1 93 2 P tertamylphenoxy J ture is then poured into an aqueous sodium chlomesidinoanthraqulnone are replaced by 49 parts ride solution of 10% Strength and the a 1 fz f' 2 3 p g P gg tated dyestufi isolated by suction filtration. The P xyl moan W 1 e O erwlse dyestuff is adjusted to neutrality by trituration followmg the precedmg prescriptions as to of the moist paste with sodium carbonate and densation and sulfonation. 40 then dried Example 9 The sulfonation can also be carried out with addition of 5-10 parts of oleum; in this event, the A mixture of parts of benzoylacetic acid temperature has to be reduced to 10-15. thyl s r, parts of sodium rb n t 0 The dyestufi thus obtained dyes animal fibers parts of 1-amino-2-p-cresoxy-4-p-chloranilidoin red-violet shades. The dyeing on wool is of anthraquinone and '70 parts of p tert. amylexcellent fastness to fulling and to light. phenol is stirred at 170 until the distillation of A' red-violet dye of very good fastness to fullthe produced readily volatile products ceases and ing and to light is also obtained if, in this exa test specimen in nitrobenzene is no longer redample, the 1-amino-2-p-tert.-amylphenoxy-4-pder than a preceding test specimen. The re- 50 phenoxy-anilidoanthraquinone is replaced by an action mixture is then cooled to and diluted equivalent quantity of 1-amino-2-p-tert.-amylwith parts of isopropyl alcohol. The beauphenoxy-4-p-phenyl-anilidoanthraquinone, while tifully crystallized base which forms is 'filtered otherwise proceeding as described in the said off, washed with isopropyl alcohol, and dried. It example. dissolves in nitrobenzene, trichlorobenzene and 55 Further examples of dyestufis which can be also in concentrated sulfuric acid with vivid red prepared in analogous manner according to the coloration. present invention are set forth in the following 10 parts of the said base are dissolved in 40 table:

EXIiIIIOHIDIQ Dyestufi Base n t ir ilui t o u Wool 13 C-benzoyl-2-phenoxy-4-ptolu.ido anthrapyridone bluish red.

14 G-benzoyl-Z-p-cresoxy-4p-toluidoanthrapyridone D 15 Cbenzoy1-2-n1-cresoxy4ptoluido-anthrapyridone red,

16 CElZeHnBZOyI-Z-(Z, 3, 5trimcthyl)-phenoxy-4-mesidino-anthrapyriyellow-red.

C-bcnioyl-2-p-cylohexylphenoxy-i-mesidino-anthrapyridone Do. C-benzoyl-Z-p-sec.amylphenoxy4mesidinoanthrapyridone Do. O-benzoyl-Z-m-ethylp11enoxy-4-mesidino-anthrapyridone Do Cbenzoyl2ptert.butylphenoxy+mesidinc-anthrapyridone o. C-benzoyl2ptert.-butylphenoxy-4-m-chloranilido-anthrapyridonc yellowish red.

red.

O-benzoyl-Z-phenoxy-i-p-chlor-anilido-anthrapyridone C benzoyl-2-p-tert.butylphenoxy4 pchloranilidoanthrapyridone.

Dyeing of Sulfonoted Product on Wool ; Formulae! the sulfonated dyestulf:

yellowish red.

The dyestuffs according to the present invention are easily soluble in water.

The treatment of the unsulfonated dyestufi bases with sulfonating agents yields first of all dyestuffs which possess only a little solubility in Water and therefore are considered as to be the monosulfonated products. This sulfonation step is to be passed by a further treatment; easily soluble products are then obtained, from the behaviour of which and the increase of the weight it must be concluded that they are disulfonated products.

The formulae of the dyestuffs in this application are given with two sulfonic acid groups, though it is not quite certain where these groups have entered in the molecule. It is however probable that they are attached to the aryloxy and to the arylamino groups respectively. Nevertheless it is possible that the integer 2 is an average and that besides the dissulfonated dyestuffs there may exist small amounts of the monoand the trisulfonated ones. It is even possible that the average sum of the sulfonic acid groups in the dyestufis is a little less or more than two.

Example 43 Dyeing with a representative dyestuff according to the present invention may be carried out, for example as follows:

2 parts of the dyestuff in standard form are dissolved in 800 parts of water of 80 C. The solution is poured into 9200 parts of water of 40-50 C.; 10 parts of Glaubers salt and 2 parts of acetic acid are added.

Then parts of wool are entered in the dyebath. The latter is heated to the boil and boiled for half an hour. After cooling the bath to 40 C., 2 parts of acetic acid are anew added, and the dyebath is kept at the boil for another half an hour.

After this operation the dyed wool is rinsed with water and dried.

Having thus disclosed the invention, what is claimed is:

2,644,821 1 1 1 2 1. A dyestufi of the anthrapyridone series cor- 4. The dyestuff corresponding t th formula responding to the formula r I 5. The dyestufi corresponding to the formula wherein X stands for a member selected from O O the class consisting of phenyl, alkylphenyl and H I cycloalkylphenyl groups, Y stands for a mem- C 0 her selected from the group consisting of phenyl, NH 11 alkylphenyl, phenoxyphenyl, chlorophenyl, bro- II I I 3113 CH; mophenyl, diphenyl and tetrahydronaphthyl v radicals, and R is a member selected from the OH I class consisting of H, CH3, Cl, Br, OCHx and 3 3 nitro. I

2. The dyestuff corresponding to the formula NH so n Q n SOSH 6. The dyestufi corresponding to the formula I (5H3 Cl -o ooH1oH@ I f 0 NH S0311 (1311a SOH 1 CH1 CH3 3. The dyestufi corresponding to the formula g NH- 40 SOQH 0 0 II II ALBIN PETER 0 NH so H r u I om JACQUES GUNTHART.

O a m H References Cited in the file of this patent C 3 UNITED STATES PATENTS Number Name Date 1,891,317 Peter Dec. 20, 1932 5083 1,912,301 Peter May 30, 1933 2,268,814 Frame Jan. 6, 1942 

1. A DYESTUFF OF THE ANTHRAPYRIDONE SERIES CORRESPONDING TO THE FORMULA 